| abstract |
A polyester resin containing Rosin (60 to 80% by weight on polymer solids),Maleic anhydride (5 to 15% by weight on polymer solids), tri and terta functional5polyols such as trimethylolpropane, pentaerythritol (10 to 20% by weight onpolymer solids) is provided having acid value of 60 to 105 mg KOH/g and ahydroxyl value of 0 to 40 mg KOH/g. The number average molecular weight is500 to 1500 and the polydispersity index is >10. The glass transitiontemperature of the polyester is 60 to 1000C as measured by DSC and is10compatible with alcohols, ketones, glycol ethers, esters, ethers, aromatics. |